https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:modern-physics/x0e2f5a2c:atoms-and-light/v/blackbody_radiation 2024-06-14T17:21:05.861633961Z Blackbody radiation A blackbody is an idealized object that absorbs all electromagnetic radiation (light) that shines on it. Blackbodies do not perpetually warm up as they absorb light because the accelerating charged particles inside them radiate their own light. The spectrum radiated by a blackbody depends only on its temperature. The hotter a blackbody is, the more intense its radiation is, and the shorter its peak wavelength is. The relationship between temperature and spectrum is used to estimate a star's surface temperature based on its color. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/ea79b022-d8be-49d5-9da6-6929ca4d244b_1280_720_base.png Blackbody radiation A blackbody is an idealized object that absorbs all electromagnetic radiation (light) that shines on it. Blackbodies do not perpetually warm up as they absorb light because the accelerating charged particles inside them radiate their own light. The spectrum radiated by a blackbody depends only on its temperature. The hotter a blackbody is, the more intense its radiation is, and the shorter its peak wavelength is. The relationship between temperature and spectrum is used to estimate a star's surface temperature based on its color. https://cdn.kastatic.org/ka-youtube-converted/DHG61XPuWyk.mp4/DHG61XPuWyk.mp4 858 Blackbody radiation and stellar properties https://www.khanacademy.org/science/revision-term-2-jnv-physics-grade-11/x077d246dcd1fe558:week-2/x077d246dcd1fe558:thermal-properties-of-matter/e/wien-s-displacement-law 2025-06-30T11:35:29.115562617Z Wien's Displacement Law Wien's Displacement Law Chandan Ganotra exercise https://www.khanacademy.org/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/v/radius-of-observable-universe 2021-04-04T12:52:27Z Radius of observable universe Radius of Observable Universe Sal Khan video https://cdn.kastatic.org/googleusercontent/sVQyaTNAayDXAxRdrP4S0vsEAHd8YND1HtlYds0SJa4I_eciVraSZazEKKEJ3KIyabi-5ctpy7n2K8nzdENu6VjHTg Radius of observable universe Radius of Observable Universe https://cdn.kastatic.org/ka-youtube-converted/6nVysrZQnOQ.mp4/6nVysrZQnOQ.mp4 999 Blackbody radiation and stellar properties https://www.khanacademy.org/science/revision-term-2-jnv-physics-grade-11/x077d246dcd1fe558:week-2/x077d246dcd1fe558:thermal-properties-of-matter/e/stefanboltzmann-law 2025-06-30T11:35:29.115562617Z Stefan–Boltzmann Law Stefan–Boltzmann Law Chandan Ganotra exercise https://www.khanacademy.org/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/v/correction-radius-of-observable-universe 2021-03-18T10:33:23Z Radius of observable universe (correction) (Correction) Radius of Observable Universe Sal Khan video https://cdn.kastatic.org/googleusercontent/f15u3BObTjQ4Ll1LFS7ZhbHwZk86JpXrYAcGXK80ExmRSEIhP4WmqM224wyutT1VNAAM8iIomZ5hvyINBnOx6sxn Radius of observable universe (correction) (Correction) Radius of Observable Universe https://cdn.kastatic.org/ka-youtube-converted/b6VQv76BQDs.mp4/b6VQv76BQDs.mp4 134 Blackbody radiation and stellar properties https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:spectroscopy-and-the-electromagnetic-spectrum/v/introduction-to-spectroscopy 2021-07-02T21:35:40Z Introduction to spectroscopy Spectroscopy is the study of the interaction of light and matter. Many types of spectroscopy rely on the ability of atoms and molecules to absorb or emit electromagnetic (EM) radiation. The absorption or emission of different forms of EM radiation is related to different types of transitions. Microwave radiation is associated with molecular rotational transitions, infrared radiation is associated with molecular vibrational transitions, and UV/visible radiation is associated with electronic transitions. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Introduction to spectroscopy Spectroscopy is the study of the interaction of light and matter. Many types of spectroscopy rely on the ability of atoms and molecules to absorb or emit electromagnetic (EM) radiation. The absorption or emission of different forms of EM radiation is related to different types of transitions. Microwave radiation is associated with molecular rotational transitions, infrared radiation is associated with molecular vibrational transitions, and UV/visible radiation is associated with electronic transitions. https://cdn.kastatic.org/ka-youtube-converted/LYseY0y2tgg.mp4/LYseY0y2tgg.mp4 294 Blackbody radiation and stellar properties https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:spectroscopy-and-the-electromagnetic-spectrum/e/spectroscopy-and-the-electromagnetic-spectrum 2026-04-08T01:15:04.085520103Z Spectroscopy and the electromagnetic spectrum Check your understanding of molecular and electronic transitions in this set of free practice questions designed for AP Chemistry students. exercise